Entertainment Weekly spoke to Dollhouse's creator about the first season's final episode, which will make its official debut at San Diego Comic-Con before appearing on the Season 1 DVD released July 28th:
It has a very different structure and feel from what we do on Dollhouse, so it would have been ridiculously startling to have aired it the week after the season finale as just this insane coda, [a]nd it is a little bit insane, except that we sort of follow everything through to its logical conclusion. As always, it's logical to conclude that people are terrible and will try to destroy each other.
What sort of destruction can we expect? EW revealed that the episode follows the discovery of Amy Acker's Whiskey being discovered, wiped of the Dr. Saunders personality, in an abandoned Dollhouse ten years from now, with flashbacks revealing how things got that way. "[Y]ou will find out snippets of everything and all of nothing," explains Whedon, "Every flashback answers something about where people are heading but brings up a lot more questions about where they end up or how they got there."
Dollhouse season two begins on Fox on September 25th.
Joss Whedon talks about EW's 'Epitaph One' first-look images [Entertainment Weekly]